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Record Information
StatusExpected but not Quantified
Creation Date2006-10-16 12:36:47 UTC
Update Date2020-02-26 21:25:39 UTC
Secondary Accession Numbers
  • HMDB0014874
  • HMDB05009
  • HMDB14874
Metabolite Identification
Common NameEsomeprazole
Description(S)-Esomeprazole, also known as esomeprazol or inexium paranova, belongs to the class of organic compounds known as sulfinylbenzimidazoles. These are polycyclic aromatic compounds containing a sulfinyl group attached at the position 2 of a benzimidazole moiety. Route of Elimination: Approximately 80% of the administered dose of esomeprazole is excreted as metabolites in urine and the remaining 20% is excreted in feces (S)-Esomeprazole is a drug. Esomeprazole is a proton pump inhibitor (brand names Nexium; Esomeprazole is a proton pump inhibitor which reduces gastric acid secretion through inhibition of H+/K+-ATPase in gastric parietal cells. By inhibiting the functioning of this enzyme, the drug prevents formation of gastric acid. Esopral and Axagon in Italy) used in the treatment of dyspepsia, peptic ulcer disease (PUD), gastroesophageal reflux disease (GORD/GERD) and Zollinger-Ellison syndrome (S)-Esomeprazole is a strong basic compound (based on its pKa). By acting specifically on the proton pump, Esomeprazole blocks the final step in acid production, thus reducing gastric acidity (S)-Esomeprazole is a potentially toxic compound. Esomeprazole is a proton pump inhibitor that suppresses gastric acid secretion by specific inhibition of the H+/K+-ATPase in the gastric parietal cell.
Inexium paranovaChEBI
Esomeprazole strontium anhydrousHMDB
Strontium, esomeprazoleHMDB
Esomeprazole sodiumHMDB
Esomeprazole strontiumHMDB
AstraZeneca brand OF esomeprazole magnesiumHMDB
Esomeprazole magnesiumHMDB
Esomeprazole potassiumHMDB
Chemical FormulaC17H19N3O3S
Average Molecular Weight345.416
Monoisotopic Molecular Weight345.114712179
IUPAC Name5-methoxy-2-[(S)-(4-methoxy-3,5-dimethylpyridin-2-yl)methanesulfinyl]-1H-1,3-benzodiazole
Traditional Name5-methoxy-2-[(S)-(4-methoxy-3,5-dimethylpyridin-2-yl)methanesulfinyl]-1H-1,3-benzodiazole
CAS Registry Number119141-88-7
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as sulfinylbenzimidazoles. These are polycyclic aromatic compounds containing a sulfinyl group attached at the position 2 of a benzimidazole moiety.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
Sub ClassSulfinylbenzimidazoles
Direct ParentSulfinylbenzimidazoles
Alternative Parents
  • Sulfinylbenzimidazole
  • Anisole
  • Alkyl aryl ether
  • Methylpyridine
  • Pyridine
  • Benzenoid
  • Azole
  • Imidazole
  • Heteroaromatic compound
  • Sulfoxide
  • Azacycle
  • Ether
  • Sulfinyl compound
  • Organic nitrogen compound
  • Hydrocarbon derivative
  • Organosulfur compound
  • Organooxygen compound
  • Organonitrogen compound
  • Organic oxide
  • Organopnictogen compound
  • Organic oxygen compound
  • Aromatic heteropolycyclic compound
Molecular FrameworkAromatic heteropolycyclic compounds
External Descriptors
  • 5-methoxy-2-\{[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]sulfinyl\}-1H-benzimidazole (CHEBI:50275 )
Physiological effect

Health effect:


Route of exposure:

Biological location:


Naturally occurring process:


Industrial application:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water SolubilityNot AvailableNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.35 g/LALOGPS
pKa (Strongest Acidic)9.68ChemAxon
pKa (Strongest Basic)4.77ChemAxon
Physiological Charge0ChemAxon
Hydrogen Acceptor Count5ChemAxon
Hydrogen Donor Count1ChemAxon
Polar Surface Area77.1 ŲChemAxon
Rotatable Bond Count5ChemAxon
Refractivity93.66 m³·mol⁻¹ChemAxon
Polarizability35.81 ųChemAxon
Number of Rings3ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleNoChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0udj-0902000000-d7c360235f936b712320Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-0002-0509000000-a35086072388d122723eSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-0002-0902000000-cf6c80499c6b8e76c5d5Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-0ul9-3900000000-2356754b2ae17bd3bc19Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-0007-0709000000-1b29375937cfcb406414Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-002b-0900000000-3383df9e4bfd7979d5e5Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-004i-0900000000-4fb7ec8321857498646dSpectrum
Biological Properties
Cellular Locations
  • Membrane (predicted from logP)
Biospecimen LocationsNot Available
Tissue LocationsNot Available
Normal Concentrations
Not Available
Abnormal Concentrations
Not Available
Predicted Concentrations
BiospecimenValueOriginal ageOriginal sexOriginal conditionComments
Blood0.000 uMAdult (>18 years old)BothNormalPredicted based on drug qualities
Blood0.000 umol/mmol creatinineAdult (>18 years old)BothNormalPredicted based on drug qualities
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB00736
Phenol Explorer Compound IDNot Available
FooDB IDFDB023582
KNApSAcK IDNot Available
Chemspider ID7843323
KEGG Compound IDNot Available
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkEsomeprazole
METLIN IDNot Available
PubChem Compound9568614
PDB IDNot Available
ChEBI ID50275
Food Biomarker OntologyNot Available
VMH IDNot Available
MarkerDB ID
Synthesis ReferenceKohl, Bernhard; Senn-Bilfinger, Joerg. Enantiomerically pure (pyridylmethylsulfinyl)benzimidazoles useful as drugs, and their preparation from racemates. Ger. Offen. (1992), 8 pp. CODEN: GWXXBX DE 4035455 A1 19920514 CAN 117:90285 AN 1992:490285
Material Safety Data Sheet (MSDS)Not Available
General References
  1. Lind T, Rydberg L, Kyleback A, Jonsson A, Andersson T, Hasselgren G, Holmberg J, Rohss K: Esomeprazole provides improved acid control vs. omeprazole In patients with symptoms of gastro-oesophageal reflux disease. Aliment Pharmacol Ther. 2000 Jul;14(7):861-7. [PubMed:10886041 ]


General function:
Involved in monooxygenase activity
Specific function:
Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It performs a variety of oxidation reactions (e.g. caffeine 8-oxidation, omeprazole sulphoxidation, midazolam 1'-hydroxylation and midazolam 4-hydroxylation) of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,8-cineole 2-exo-monooxygenase. The enzyme also hydroxylates etoposide.
Gene Name:
Uniprot ID:
Molecular weight:
General function:
Involved in monooxygenase activity
Specific function:
Responsible for the metabolism of a number of therapeutic agents such as the anticonvulsant drug S-mephenytoin, omeprazole, proguanil, certain barbiturates, diazepam, propranolol, citalopram and imipramine.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. doi: 10.1093/nar/gkp970. Epub 2009 Nov 24. [PubMed:19934256 ]
  2. Klotz U: Clinical impact of CYP2C19 polymorphism on the action of proton pump inhibitors: a review of a special problem. Int J Clin Pharmacol Ther. 2006 Jul;44(7):297-302. [PubMed:16961157 ]
General function:
Involved in ATP binding
Specific function:
Catalyzes the hydrolysis of ATP coupled with the exchange of H(+) and K(+) ions across the plasma membrane. Responsible for acid production in the stomach.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Saccar CL: The pharmacology of esomeprazole and its role in gastric acid related diseases. Expert Opin Drug Metab Toxicol. 2009 Sep;5(9):1113-24. doi: 10.1517/17425250903124363. [PubMed:19606942 ]
  2. McKeage K, Blick SK, Croxtall JD, Lyseng-Williamson KA, Keating GM: Esomeprazole: a review of its use in the management of gastric acid-related diseases in adults. Drugs. 2008;68(11):1571-607. [PubMed:18627213 ]
  3. Vachhani R, Olds G, Velanovich V: Esomeprazole: a proton pump inhibitor. Expert Rev Gastroenterol Hepatol. 2009 Feb;3(1):15-27. doi: 10.1586/17474124.3.1.15. [PubMed:19210109 ]
  4. Chen X, Ji ZL, Chen YZ: TTD: Therapeutic Target Database. Nucleic Acids Res. 2002 Jan 1;30(1):412-5. [PubMed:11752352 ]